Xylophone & Other Barred Percussion is now available in iBooks and Kindle formats, in addition to the color print edition. You get the same 44 lessons, complete with zoom-enabled scores, and working links from one part of the book to another.
iBooks (iPad, iPhone, iPod): $16.99
(Due to Amazon royalty contracts, the Kindle version has been split into two volumes. Notice that this is still an incredible discount compared to the print edition.)
Kindle Edition, Part I: $8.49
Kindle Edition, Part II: $8.49